Modelling of urea gas phase thermolysis and theoretical details on urea evaporation
Artikel i vetenskaplig tidskrift, 2011

A model study of droplet decomposition of a urea–water solution (UWS) for selective catalytic reduction applications (SCR) has been undertaken. A new vapour pressure equation for urea has been adopted to predict the rate of urea evaporation. The vapour pressure above liquid urea is obtained by extrapolating the vapour pressure above solid urea. Gas phase decomposition of urea into ammonia and isocyanic acid is further assumed to be fast, dictating the boundary conditions for the evaporation process. The rate of UWS evaporation is compared to recently published data and shows good agreement. A set of Antoine parameters was fitted to the derived vapour pressure to facilitate future simulations.

urea

modelling

vaporization

thermolysis

Författare

Andreas Lundström

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Björn Waldheim

Scania AB

Henrik Ström

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Björn Westerberg

Chalmers University of Technology

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering

0954-4070 (ISSN)

Vol. 225 1392-1398

Drivkrafter

Hållbar utveckling

Ämneskategorier

Kemiska processer

Kemiteknik

DOI

10.1177/0954407011406048